Ryoma Mikoshiba, an ordinary high-schooler adept at martial arts, one day finds himself summoned to another world. The ones who summoned him, the O’ltormea Empire, cite the fact that 'when those summoned kill another living being, they can absorb a fraction of their strength and make it their own' as their reason. But upon learning the empire uses those they summon to strengthen themselves by foul means, Ryoma is consumed by hatred and slays an important member of the O’ltormean court. Attempting to escape the Empire's borders while keeping his identity a secret, he is accosted by two twin sisters— one golden-haired, the other silver-haired— in a meeting that sets the gears of fate in motion. The curtain rises on a record of the wars of a young supreme ruler in this other world fantasy!
Ryoma Mikoshiba, an ordinary high-schooler adept at martial arts, one day finds himself summoned to another world. The ones who summoned him, the O’ltormea Empire, cite the fact that 'when those summoned kill another living being, they can absorb a fraction of their strength and make it their own' as their reason. But upon learning the empire uses those they summon to strengthen themselves by foul means, Ryoma is consumed by hatred and slays an important member of the O’ltormean court. Attempting to escape the Empire's borders while keeping his identity a secret, he is accosted by two twin sisters— one golden-haired, the other silver-haired— in a meeting that sets the gears of fate in motion. The curtain rises on a record of the wars of a young supreme ruler in this other world fantasy!
The Empire of O'ltormea, a militaristic country, summoned Ryoma Mikoshiba, a high schooler from another world. Dealing a major blow to the empire, Ryoma escapes their clutches. With the twin sisters Laura and Sara at his side, Ryoma meets a mercenary group called the Crimson Lion. In the middle of mercenary work, Ryoma accidentally becomes involved in the inner workings of the Kingdom of Rhoadseria. Now forced to employ his wit and cunning in this world, Ryoma makes a pledge. "I'll take it back, no matter what - the fate that's been stolen from me!" The Rhoadseria Civil War arc, which marks Ryoma's first progress towards supreme ruler, begins!
Ryoma Mikoshiba prepares to open a new destiny for the Kingdom of Rhoadseria! The Kingdom of Rhoadseria's inner turmoil grows all the more intense. Ryoma Mikoshiba, a high-schooler summoned to another world from modern day Japan, begins gathering forces for Princess Lupis, heir of the Rhoadserian throne. Lupis's camp gathers powerful warriors, like the mercenary woman Lione the Crimson Lion, but they're still at a vast numerical disadvantage. But Ryoma marches into the battlefield, ready to decide the critical battle with strategies that would guarantee his victory...
The battle to decide the fate of a country torn in two is about to begin! Thanks to Ryoma Mikoshiba’s achievements, momentum swings in favor of Princess Lupis’s faction. One of her nemeses, General Albrecht, has holed up in the enemy stronghold of Heraklion. Just as victory seems certain for Princess Lupis’s side, Gennou and Sakuya, who have infiltrated the city on Ryoma’s orders, return with news of suspicious activity. And at the same time, further tragedy is about to strike in Japan… The time has come for Ryoma to make a crucial decision, one that will change the fate of the Kingdom of Rhoadseria…
Following his achievements in concluding the civil war in Rhoadseria, Ryoma Mikoshiba is awarded the title of duke and the territory of the Wortenia Peninsula. But as it turns out, Wortenia is an undeveloped land. Realizing he was driven to the peninsula because he was feared for his power, Ryoma plots to turn Wortenia into his foothold toward gaining power. The start of a new chapter in Ryoma’s story, now as a feudal lord!
Having become the Baron of the Wortenia peninsula, Ryoma Mikoshiba seeks to broaden his influence. And yet, Ryoma learns that Count Salzberg seeks to take advantage of him. Ryoma exploits the count's weaknesses and strikes a deal that earns him his full cooperation. He then sets out to suppress the peninsula itself with the slaves he liberated, but an unexpected encounter awaits him in the lands of Wortenia... The fantasy story of a summoned man's journey to domination reaches its sixth volume!
Ryoma Mikoshiba begins establishing the Wortenia Peninsula as his territory. But his plans grind to a halt when one of the greatest powers in the western continent, the Kingdom of Helnesgoula, embarks on a military expedition. Queen Lupis, ruler of the Kingdom of Rhoadseria, orders Ryoma to dispatch his army to help with the war effort. Ryoma leads his elite troops on what at first seems like a dispatch that bears absolutely no merit for him. But Ryoma plots to use the topography of the Wortenia Peninsula to reap great gains. And, at the same time, he begins building up relations with the demi-human population which has spent years detached from human contact in the lands of Wortenia...
Xarooda, Myest, and Rhoadseria join forces to fight against the O'ltormea Empire. As each country acts in the favor of its own interests, Ryoma Mikoshiba begins acting on his own. A battle between O'ltormea and the three countries begins, with no end in sight. Ryoma acts to set himself up as the true winner of this war, forming alliances outside of the Kingdom of Rhoadseria. At the same time, the great power of the north, Helnesgoula, begins moving its armies. Its intentions are unclear, but Ryoma sees this as a chance to contact this powerful kingdom... The fantasy epic of a young leader and his strategic plays reaches its eighth volume!
Turmoil and war rage in the continent, and to emerge victorious, Ryoma moves to topple an impregnable fortress! As the O'ltormea Empire’s conflict with the eastern kingdoms intensifies, Ryoma suggests to impede the Empire that once summoned him to this world by capturing Fort Notis, a crucial base for their invasion efforts. However, Ryoma’s plan is as daring as it is grand; a gamble that involves sneaking into enemy territory. Everyone but Ryoma seems to think this idea is all but impossible, but Ryoma finds a surprising way in... The ninth volume of this fantasy epic of a young leader and his strategic plays!
The O’ltormean invasion war against the Three-Kingdom Alliance reaches its conclusion thanks to Ryoma’s efforts. In so doing, Ryoma forms a powerful connection with Xarooda’s king, Julianus I. With these achievements under his belt, Ryoma makes his triumphant return to his domain in the Wortenia Peninsula. However, Sudou and his Organization continue to act in secret, sowing chaos throughout the western continent. Seeing Ryoma’s influence and realizing the threat he might pose, they begin to weave dangerous new plots... The fantasy epic of a young leader and his strategic plays reaches its tenth volume!
Having returned to the Wortenia Peninsula, Ryoma pursues his duties as governor while developing his army. He intends to eventually break free from the Kingdom of Rhoadseria and declare independence, so he lays the groundwork for the war to come. He sends his confidant, Kevin, to infiltrate Rhoadseria and gather intelligence. Meanwhile, Rhoadseria’s public order is in a state of chaos following the war. Seeking to take advantage of this, the Organization works behind the scenes to drive that unrest to its breaking point.
Ryoma Mikoshiba prepares for a rebellion. It’s not long until his actions sow chaos across the Kingdom of Rhoadseria. The nobles start turning their backs on Queen Lupis, and the kingdom begins to split into factions. As the rebellion unfolds, it begins to have a dangerous effect on the surrounding countries as well. It's then that Ryoma hears the whisper of Kikoku—his enchanted blade, which has yet to show its true potential...
The rebellions continue across the Kingdom of Rhoadseria and reach their climax in the north! Having planned and prepared for war, Ryoma’s army marches like a hurricane on Count Salzberg’s domain! The ten houses of the north, headed by northern Rhoadseria’s prominent nobles, rise to meet his challenge. However, the first battle ends with a tie, and Count Salzberg holes up within the citadel city of Epirus. Ryoma realizes that a frontal attack would be too difficult and decides to employ psychological warfare. Meanwhile, in the royal capital of Rhoadseria, the repeated domestic conflicts weigh heavily on Queen Lupis’s mind...
The long-standing upheaval in northern Rhoadseria approaches its conclusion! Ryoma Mikoshiba’s plan has caused countless refugees to flood Epirus, who clash with its citizens and plunge the city into chaos. In the midst of this violence, Signus decides to cut a new path with his own two hands. Meanwhile, Ryoma uses Lady Yulia to achieve his goal. However, this act only sparks animosity among the country’s nobility. As the war rages on, new conflict approaches from the south. Ryoma relishes in a momentary victory, but new clouds of war brew over him!
A new war beckons Ryoma Mikoshiba! Having won the war he waged against the north, Ryoma prepares to occupy Count Salzberg's former domain, but a conversation with Signus hints at a new threat. The Kingdom of Rhoadseria’s House of Lords will definitely try to charge and punish Ryoma for starting a war with a fellow noble. This would mean all-out war with the Rhoadserian nobles, so Ryoma calls Simone, head of the Christof Company, for a meeting. Meanwhile, Robert, who is being held captive, reconciles with his best friend Signus and comes to a fateful decision. New foes and allies await in the fifteenth volume of this fantasy war epic!
The Kingdom of Rhoadseria’s House of Lords summons Ryoma Mikoshiba as a “witness,” so he travels to the capital to meet with them. However, the House of Lords aren’t the only ones welcoming Ryoma with ulterior motives. Everyone, even the queen, seems to be conspiring against him. Resolved to rebel against the kingdom, Ryoma holds a large evening party flaunting the riches of the now-prosperous Wortenia Peninsula in a bid to turn the neutral nobles to his side. Not everyone is in a party mood, though, as uninvited guests sneak in to assassinate Ryoma! Will the House of Lords attempt to arrest Ryoma for his war with Count Salzberg? And just who is sending these assassins? The winds of rebellion kick up once again in Rhoadseria!
Ryoma’s showdown with the other nobles begins in earnest! The House of Lords’ hearing is finally underway, and Rhoadseria’s nobles viciously question Ryoma about his war with Count Salzberg. Ryoma is prepared for anything they can throw at him, and thanks to Signus’s and Robert’s testimonies, the hearing progresses in Ryoma’s favor. Ryoma, however, has enemies in high places, and when Queen Lupis steps in to personally hand down the verdict, the situation turns ugly. With no choice but to run, Ryoma makes to escape the capital with Lione's detachment, only to be met with help from an unexpected ally! Will Queen Lupis put an end to Ryoma’s plans to conquer Rhoadseria? Or will Ryoma and his growing list of allies outsmart and overthrow the indecisive sovereign?
Having dealt a painful blow to his pursuers in the Battle of the Cannat Plains, Ryoma Mikoshiba retreats back to Wortenia. However, Queen Lupis is determined to punish Ryoma as a traitor of the kingdom, so she organizes all of Rhoadseria’s armies—creating her own force of over two hundred thousand men—with the intention of defeating Ryoma, hoping that she can overwhelm and crush him with numbers. Now at a disadvantage, Ryoma finds support in an unexpected ally. He decides to join forces with them, but will that be enough to challenge a queen with a grudge and an outlandish army?
Queen Lupis marches her army of two hundred thousand soldiers on the citadel city of Epirus, where Ryoma Mikoshiba fortifies his defenses. Determined to subjugate the north and finally eliminate her most troublesome enemy, she allows the army to pillage whatever they come across—sacrificing her own citizens in the process. The queen is not the only one making plans, however, as numerous others, friends and foe alike, concoct their own schemes in preparation of this unprecedented war. Ryoma Mikoshiba is also gathering allies and troops, but with the Wortenia army vastly outnumbered, defeat seems certain. Nonetheless, Ryoma sets a meticulous trap in Epirus, hoping to turn the tides of the war...
Ryoma’s stronghold at Fort Tilt is under siege by Queen Lupis’s army of two hundred thousand. However, his schemes cause a food shortage for the attacking army, striking a blow to their morale. Meanwhile, a faction that Queen Lupis once defeated seeks to make a resurgence in Rhoadseria...
Having chased out Queen Lupis’s army, Ryoma marches on to the capital, Pireas. There, Meltina and Queen Lupis discuss options with Mikhail and realize their only choice is to hold the fort and fend off Ryoma’s siege. However, Ryoma learns that the Church of Meneos has Asuka in custody. Since he cannot spare any forces, he chooses to rescue her with a small group.
The Mikoshiba barony army lays siege to the capital city of Pireas, but Ryoma faces a predicament. While a direct charge would result in needless casualties, prolonging the siege runs the risk of a foreign power coming to Queen Lupis’s aid. However, the tide of the war starts shifting when Ryoma receives an unexpected letter from a surprising person.